20000202000021 has 16 divisors (see below), whose sum is σ = 29811707600320. Its totient is φ = 13251667579920.

The previous prime is 20000202000017. The next prime is 20000202000091. The reversal of 20000202000021 is 12000020200002.

It is not a de Polignac number, because 20000202000021 - 2² = 20000202000017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20000201999967 and 20000202000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20000202000091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2272229410 + ... + 2272238211.

It is an arithmetic number, because the mean of its divisors is an integer number (1863231725020).

Almost surely, 2^{20000202000021} is an apocalyptic number.

It is an amenable number.

20000202000021 is a deficient number, since it is larger than the sum of its proper divisors (9811505600299).

20000202000021 is a wasteful number, since it uses less digits than its factorization.

20000202000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544467793 (or 4544467787 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20000202000021 its reverse (12000020200002), we get a palindrome (32000222200023).

The spelling of 20000202000021 in words is "twenty trillion, two hundred two million, twenty-one", and thus it is an aban number.